# USPS mail classes USPS mail classes group mail by content, such as First-Class Mail for correspondence and USPS Marketing Mail for circulars and catalogs.[^1][^2] Within a class, postage depends on weight, on distance for zoned products, and on the preparation and volume that commercial prices require.[^3][^4] Each class has service standards, USPS's delivery goals, usually counted in days.[^5] Updated November 5, 2026. 79 sources. ## Questions ### Can USPS First-Class Mail be used to transmit confidential materials? Yes: First-Class Mail is a protected class of mail by law, and federal agencies such as the State Department accept it for classified information.[^6] It includes all matter sealed or otherwise closed against inspection.[^2] Priority Mail and Priority Mail Express are closed against postal inspection too.[^7][^8] ### What is USPS Bound Printed Matter, and what are its mailing requirements? Bound Printed Matter is a Package Services product for permanently bound sheets, such as books, catalogs and telephone directories, weighing up to 15 pounds.[^9] At least 90% of the sheets are printed with advertising, promotional, directory or editorial matter.[^9] Its prices go by weight, and presorted and carrier route pieces cost less if entered at the destination sectional center facility or delivery unit.[^10][^11][^12][^13] ### What is the purpose of the USPS postal zone charts? Zone charts show how far a piece travels, from the ZIP Code where it enters the mail to the ZIP Code that delivers it.[^14][^3] Postage for zoned mail depends on the piece's weight and that distance.[^14] The charts hold zone information only, not postage rates.[^14] ### Is USPS Ground Advantage the same as First-Class or Priority Mail? No: USPS Ground Advantage ships packages up to 70 pounds by ground, in 2 to 5 days across the continental U.S., without a guarantee.[^15] Priority Mail is expedited but not guaranteed, and Priority Mail Express guarantees overnight to 2-day delivery to most U.S. destinations or the money back.[^7][^15] USPS Ground Advantage replaced First-Class Package Service on July 9, 2023, while First-Class Mail is the class for letters, postcards and large envelopes.[^16][^15] ### What is the difference between USPS Bound Printed Matter and Media Mail? Bound Printed Matter carries bound printed sheets such as books and catalogs, while Media Mail carries books, sound recordings and film.[^9][^17] Media Mail prices are based on weight without regard to zone, and advertising restrictions apply.[^17] Bound Printed Matter weighs up to 15 pounds, and its prices go by weight and where the mailer enters it, not by zone.[^9][^10] ### How does USPS Priority Mail Express work? Priority Mail Express is an expedited service with a money-back guarantee for next-day or second-day delivery in most cases.[^8] Postage is charged by weight and zone, except for Flat Rate Envelopes, which cost $38.25 to $39.25 at retail as of October 4, 2026.[^8][^10] The service is closed against postal inspection.[^8] ### How does USPS Marketing Mail work? USPS Marketing Mail is a class for pieces under 16 ounces, such as circulars, catalogs and direct mail.[^2] A mailing needs at least 200 pieces or 50 pounds of mail to earn business mail discounts.[^18] Authorized nonprofit organizations pay prices about 40% lower.[^19] ### How do I apply for a USPS nonprofit bulk mail permit? An organization applies for nonprofit authorization through the Business Customer Gateway or on PS Form 3624, and individuals other than voting registration officials may not.[^20][^21] Someone in authority, such as the president or treasurer, signs the application, never a printer or mailing agent.[^21] The [Pricing and Classification Service Center](https://postalref.com/products/pricing-and-classifications-service-center.md) reviews it, which may take up to 14 days.[^20] ## How it fits together A mail class is a group of domestic mail defined by content, such as personal correspondence or printed advertising.[^1] Each class divides into products, and each product into price categories.[^22][^23] For competitive products, the shipping services that private carriers also offer, USPS uses the word product rather than mail class.[^24][^1] Each class and product has its own [service standards](https://postalref.com/guides/mail-processing.md), USPS's stated delivery goals, usually measured in days.[^5] First-Class Mail carries correspondence, bills and anything sealed against inspection.[^2] USPS Marketing Mail carries pieces under 16 ounces, such as circulars and catalogs.[^2] [Periodicals](https://postalref.com/products/periodicals.md) carries newspapers and magazines sent to an established list of subscribers or requesters.[^25] A publisher reports each issue's advertising percentage, because it sets part of the postage.[^25] [Periodicals Accuracy, Grading, and Evaluation](https://postalref.com/products/periodicals-accuracy-grading-and-evaluation-page-program.md) is a USPS certification of the software that calculates that percentage.[^26] Priority Mail Express and Priority Mail are expedited services for shipping any mailable matter.[^8][^7] USPS Ground Advantage, a ground service for packages up to 70 pounds, replaced First-Class Package Service and Parcel Select Ground in 2023.[^15][^27] Parcel Select is a commercial product, typically for gifts and merchandise.[^2] Package Services is the class for Bound Printed Matter, Library Mail and Media Mail.[^2] International mail, which starts in one country and ends in another, has products of its own, such as First-Class Mail International.[^28][^11] Price categories, such as single-piece, presorted and automation prices, divide a class or product by type of price.[^23] Automation prices need mail that is [presorted](https://postalref.com/guides/presort.md) and prebarcoded.[^29] Some mail is defined by who sends or receives it, such as [Election Mail](https://postalref.com/products/election-mail-and-political-mail.md), any item mailed to or from authorized election officials.[^30] The Domestic Mail Manual holds the standards for each class and all postage prices and fees.[^31] The Pricing and Classification Service Center is USPS's one source for classification decisions.[^32] ## Correspondence, advertising and publications First-Class Mail includes all personal correspondence, all bills and statements of account, and all matter sealed against inspection.[^2] Any mailable matter may also go by First-Class Mail.[^33] Matter that must go at First-Class Mail prices and weighs more than 13 ounces goes at Priority Mail prices, unless sent by Priority Mail Express.[^7] First-Class Mail comes as letters, postcards and large envelopes, also called flats, up to 13 ounces.[^15][^11] A [flat](https://postalref.com/guides/mailpiece-design.md) is larger than a letter in at least one dimension: over 11.5 inches long, 6.125 inches high or 0.25 inch thick.[^11] A First-Class Mail flat measures up to 15 by 12 inches and 0.75 inch thick.[^11] As of October 4, 2026, a single retail First-Class Mail piece costs:[^10] - A letter with stamps: $0.82 up to 1 ounce, $1.11 up to 2, $1.40 up to 3 and $1.69 up to 3.5.[^10] - A metered letter: $0.78, $1.07, $1.36 and $1.65 at those weights.[^10] - A postcard: $0.65.[^10] - A large envelope: $1.69 up to 1 ounce, rising to $5.24 up to 13 ounces.[^10] A First-Class Mail piece is signed for only when the sender buys an [extra service](https://postalref.com/guides/extra-services.md) that keeps a record of delivery, which includes a signature.[^34][^35] Certified Mail, which gives the sender a mailing receipt and electronic verification of delivery, is open to First-Class Mail.[^34][^36] So is Registered Mail, USPS's most secure service, which tracks a piece by receipts from acceptance to delivery.[^34] USPS keeps the record of delivery, with the recipient's signature, and a sender gets it by buying a return receipt at mailing.[^34] USPS Marketing Mail is a class for pieces that weigh less than 16 ounces, such as circulars, catalogs and merchandise.[^2] Until January 22, 2017, it was called Standard Mail.[^37] It carries eligible matter that does not have to go by First-Class Mail or Periodicals.[^38] It has no single-piece price, and neither does Periodicals.[^39] Periodicals is the class for magazines, newspapers and other publications issued at least four times a year from a known office of publication.[^2] USPS uses each issue's advertising percentage to set the mailing's pound price charge.[^25] A marked copy is a copy of an issue with all its advertising marked, so USPS can verify the advertising content.[^40] Periodicals Accuracy, Grading, and Evaluation certification lets Periodicals mailers skip sending a marked copy of every issue, unless postal officials ask.[^41] - **First-Class Mail**, also called FC, FCM, First-Class: “A class of mail that includes all matter wholly or partly in writing or typewriting, all actual and personal correspondence, all bills and statements of account, and all matter sealed or otherwise closed against inspection.”[^2] - **USPS Marketing Mail**, also called SM, Marketing Mail, Standard Mail (USPS Marketing Mail), Standard Mail (A): “A class of mail that weighs less than 16 ounces. It comprises the subclasses of Regular Marketing Mail, Nonprofit Marketing Mail, Carrier Route Marketing Mail, and Nonprofit Carrier Route Marketing Mail. These subclasses include circulars, printed matter, pamphlets, catalogs, newsletters, direct mail, and merchandise.”[^2] - **Known Office of Publication**, also called KOP: “The business office of a Periodicals publication that is in the city where the original entry for Periodicals mailing privileges is authorized.”[^42] - **Periodicals**: “A class of mail consisting of magazines, newspapers, or other publications formed of printed sheets that are issued at least four times a year at regular, specified intervals (frequency) from a known office of publication.”[^2] - **marked copy**: “Publishers supply a copy of the issue to be reviewed, with all advertising marked so the advertising content can be verified by the USPS.”[^40] ## Classes for packages Priority Mail Express and Priority Mail are expedited services for any mailable matter, within size and weight limits.[^8][^7] Priority Mail Express adds a money-back guarantee for next-day or second-day delivery in most cases.[^8] Priority Mail postage depends on weight up to 70 pounds, zone and sometimes dimensions, except for flat rate and some other prices.[^7] Both services are closed against postal inspection.[^7][^8] USPS Ground Advantage is a ground service for packages up to 70 pounds and 130 inches in combined length and girth.[^15][^11] It delivers in 2 to 5 days across the continental U.S., without a guarantee.[^15] It also ships between the contiguous states and Alaska, Hawaii or a U.S. territory.[^43] Since October 1, 2026, USPS has expected those packages to take 10 days or more, mostly by surface transportation.[^44][^43] It replaced First-Class Package Service and Parcel Select Ground on July 9, 2023, and shares First-Class's [mail class code](https://postalref.com/guides/package-labels.md).[^27][^16][^45] USPS Ground Advantage Retail prices take any mailable matter, and Commercial prices need PC Postage, an approved postage meter or a permit imprint.[^11] Cubic prices, set by cubic size and zone, take parcels up to 1 cubic foot and 20 pounds.[^11] > Priority Mail packaging provided by the USPS must be used only for Priority Mail.[^46] **Must.** Boxes and envelopes that USPS provides for Priority Mail must carry only Priority Mail, not USPS Ground Advantage or another class. A piece mailed in that packaging is charged the Priority Mail price, however the packaging is refolded or its markings covered.[^46] A Priority Mail piece paid with stamps that weighs 10 ounces or less, and is no more than one half-inch thick, may go in any collection box.[^47] So may retail First-Class Mail and USPS Ground Advantage Retail pieces within those limits.[^48] A heavier or thicker piece paid only with stamps goes to an employee at a Post Office counter instead.[^47][^48] > Priority Mail pieces bearing only postage stamps as postage payment and that weigh more than 10 ounces or measure more than one half-inch in thickness may not be deposited into a collection box, Postal Service lobby drop, Postal Service dock, customer mailbox, or other unattended location.[^47] **Must.** A Priority Mail piece paid only with stamps that weighs more than 10 ounces, or is more than one half-inch thick, must not go in a collection box or any other unattended place. Parcel Select is a commercial product, typically for gifts and merchandise.[^2] Its prices fall with [destination entry](https://postalref.com/guides/mail-entry.md), when the shipper enters parcels at the facility or delivery unit that serves the address.[^12][^13] USPS Ground Advantage, Parcel Select and both Priority Mail services price a parcel over 1,728 cubic inches on actual or dimensional weight, whichever is greater.[^49] Package Services is the class for Bound Printed Matter, Library Mail and Media Mail.[^2] Bound Printed Matter carries permanently bound printed sheets, such as catalogs and directories, up to 15 pounds.[^9] Media Mail carries books, sound recordings and film, priced by weight without regard to zone.[^17] Library Mail carries items sent between libraries, museums and other authorized organizations.[^50] Some package classes include insurance or USPS Tracking, USPS's updates on an item's trip through to delivery, in their postage:[^11] - Priority Mail Express: insurance up to $100, and USPS Tracking.[^11][^15] - Priority Mail and USPS Ground Advantage: up to $100 of insurance on pieces with an [Intelligent Mail package barcode](https://postalref.com/guides/package-labels.md) or a retail tracking barcode, and USPS Tracking.[^11] - Parcel Select and Package Services, Media Mail among them: USPS Tracking.[^11] USPS Tracking collects no signature.[^11] A signature is one of the [extra services](https://postalref.com/guides/extra-services.md), and so is insurance on Parcel Select and Package Services, bought only at mailing.[^51][^11] Mail class codes: the two-character code that names a package's class of mail.[^52] Global Express Guaranteed keeps its code, though USPS suspended the service for all destinations on September 29, 2024.[^45][^53] | Code | Mail class | | --- | --- | | `BB` | Bound Printed Matter | | `BL` | Library Mail | | `BS` | Media Mail | | `CP` | Priority Mail International Parcels | | `DM` | Domestic Matter for the Blind | | `EX` | Priority Mail Express | | `FC` | First-Class/USPS Ground Advantage | | `IE` | Priority Mail Express International | | `LC` | First-Class Package Service International | | `LW` | Parcel Select Lightweight (retired 1/21/2024) | | `MR` | Priority Mail Return Service | | `PG` | Global Express Guaranteed | | `PM` | Priority Mail | | `PS` | Parcel Select | | `RP` | Parcel Return Service retail channel | | `S2` | USPS Marketing Mail™ | | `SA` | USPS Marketing Mail™ | 17 codes in the Mail Class Codes, Pub 199 Appendix J Table 8. - **Priority Mail Express**, also called PME, next-day delivery: “An expedited service for shipping any mailable matter, subject to certain standards such as size and weight limits and certain hazardous materials restrictions, with a money-back guarantee for next-day or second-day delivery in most cases.”[^8] - **USPS Ground Advantage**, also called GA, Ground Advantage: “This ground shipping sub-category provides a simple, reliable, and affordable way to ship packages weighing up to 70 pounds with day specific (non-guaranteed) delivery in 2 to 5 days across the continental U.S.”[^15] - **Parcel Select**, also called PS, PARCEL SELECT BARCODED, PARCEL SELECT NDC PRESORT, PARCEL SELECT ONDC PRESORT: “Parcel Select is a Shipping Services ground product.”[^54] - **Package Services**: “class of mail that comprises three subclasses: Bound Printed Matter, Library Mail, and Media Mail.”[^2] - **Bound Printed Matter**, also called BPM, BP: “Bound Printed Matter is typically catalogs, directories, books, and other printed material that weigh up to 15 pounds and meet specific eligibility standards”[^2] - **Media Mail**, also called BS: “A Package Services product that consist of books, sheet music, printed educational material, film, sound recordings, and computer prerecorded media such as CD-ROMs. Advertising restrictions apply. Media Mail prices are based on the weight of the piece without regard to zone.”[^17] - **Library Mail**, also called BL: “A Package Services product for items sent to or from or exchanged between academic institutions, public libraries, museums, and other authorized organizations.”[^50] - **Mail Class Code**: “A two-character code for Class of Mail.”[^52] ## International mail International mail is mail that starts in one country and ends in another.[^28] The International Mail Manual is USPS's directive with the official prices and standards for every international mail service.[^28] First-Class Mail International carries letters, postcards and large envelopes to other countries: letters up to 3.5 ounces and large envelopes up to 15.994 ounces.[^11][^15] First-Class Package International Service is its counterpart for packages and rolls.[^11][^51] Priority Mail International is similar to domestic Priority Mail, with prices based on weight and destination country.[^55] Its postage includes merchandise insurance up to $200 and up to $100 for reconstructing nonnegotiable documents.[^11] As of October 4, 2026, a retail Priority Mail International Flat Rate Envelope costs $32.65 to Canada, price group 1, and $48.80 to $62.35 elsewhere.[^10] A retail parcel of up to 1 pound costs $43.55 to Canada and $61.45 to $83.15 elsewhere.[^10] Priority Mail Express International is an expedited service available to over 190 countries.[^8] To a limited number of destinations, it has a postage-refund guarantee of date-certain delivery.[^11] As of October 4, 2026, its retail Flat Rate Envelope costs $62.70 to $102.50, by price group.[^10] Other pieces are priced by weight and price group.[^10] Global Express Guaranteed was USPS's premium international expedited service, run in alliance with FedEx Express.[^56] Its delivery was guaranteed to destination-specific standards, or the postage could be refunded.[^56] USPS suspended it for all destinations on September 29, 2024, and Post Offices accept no Global Express Guaranteed items until further notice.[^53][^57] ## Kinds of price A price category is a subdivision of a class or product by type of price.[^23] Single-piece prices are open to the general public and need no special sorting.[^39] Commercial prices, such as presorted and automation prices, need the mailer to meet preparation requirements and minimum volumes.[^4] Business mail discounts need at least 500 pieces of First-Class Mail, or 200 pieces or 50 pounds of USPS Marketing Mail, per mailing.[^18] Nonprofit prices are lower USPS Marketing Mail prices for qualified organizations, and preferred prices for Periodicals publishers authorized as nonprofits.[^58] Automation prices need mail that is presorted and prebarcoded, and they are generally lower than single-piece or nonautomation presorted prices.[^29] [Saturation prices](https://postalref.com/guides/saturation-mail.md) need mail in walk sequence to at least 90% of a route's active residential addresses, or 75% of all its active addresses.[^59] Destination entry prices are lower when the mailer carries mail to a postal facility, and generally lowest at the facility closest to delivery.[^12] Zoned prices depend on weight and the distance traveled, counted in zones.[^3] The National Zone Charts Matrix is USPS's table of the zone between each entry ZIP Code and each delivery ZIP Code.[^14][^3] Market dominant products are mailing services whose prices USPS can set with limited competition, such as First-Class Mail and Periodicals.[^60][^15] Since August 29, 2021, their prices follow a price cap partly based on the Consumer Price Index, with some added pricing authority.[^15] Until then, the law capped each class's price changes at the Consumer Price Index.[^23][^61] Competitive products are shipping services that private carriers also offer, such as Priority Mail and Parcel Select.[^24] USPS is free to price them if they cover their costs, take no subsidy from market dominant products and contribute to institutional costs.[^23] - **automation price**, also called automation rate: “A price category for mail that is presorted and prebarcoded and that meets addressing, readability, and other requirements for mail that can be processed on automated equipment. Automation prices are generally lower than prices for single-piece mail or nonautomation presorted mail.”[^29] - **National Zone Charts Matrix**: “The National Zone Charts Matrix assists mailers in determining the distance that a mailpiece travels based on the ZIP Code™ where the mailpiece enters the mailstream (origination) and the ZIP Code that will deliver the mailpiece to the addressee (destination).”[^14] - **price category**: “A subdivision of a class or product by type of price such as single-piece, presorted, and automation prices or retail, Commercial Base, and Commercial Plus prices. For example, the First-Class Mail product Presorted Letters/ Postcards has three price categories: nonmachinable, machinable, and automation.”[^23] - **commercial price**: “(1) A general term that distinguishes postage prices such as presorted or automation prices available to mailers who meet various preparation requirements and minimum volumes versus retail prices (i.e., single-piece prices) available to the public and not requiring special preparation or minimum volumes. (2) Commercial Base and Commercial Plus prices.”[^4] - **competitive products**: “A category of postal products and services (commonly referred to as shipping services) for which similar products and services are offered by private sector carriers. Pricing changes occur annually, and USPS is free to price competitive products as long as they cover their costs, are not subsidized by market dominant products (also known as mailing services), and make an appropriate contribution to institutional costs. Competitive products include Priority Mail Express service, Priority Mail service, Parcel Select service, Parcel Return Service, Premium Forwarding Service, and most international mail products except First-Class Mail International service, which is categorized as a market dominant product.”[^24] ## Special categories of mail Election Mail is any item mailed to or from authorized election officials that helps citizens take part in voting.[^30] Voters return ballots at First-Class Mail prices unless they pay for a premium service.[^62] USPS strongly recommends First-Class Mail for all ballots.[^63] Political Mail is material mailed for campaign purposes by candidates, party committees and other groups that drive voter mobilization.[^64] Official mail is mail that federal law lets U.S. government officials send, often without prepaid postage.[^65] It includes franked mail from members of Congress and penalty mail from government agencies.[^65] Agencies reimburse USPS for the penalty mail they send.[^66] Franked mail bears a signature or other required marking instead of a postage stamp.[^67] Free matter for the blind or handicapped is material mailed free of postage by or for people who cannot read conventionally printed material.[^68] It belongs to no mail class, but USPS treats it as First-Class Mail for processing, delivery and handling if undeliverable.[^68] The piece is marked `Free Matter for the Blind or Handicapped` in the upper right corner of the address side.[^68] Free matter is also available as an international service.[^68] A Nonprofit Authorization is the privilege, granted by law, to mail at Nonprofit USPS Marketing Mail prices.[^19] Those prices are about 40% lower than regular USPS Marketing Mail prices.[^19] Each organization name holds one authorization.[^19] An authorized organization can mail at those prices at any Post Office in the United States that accepts bulk mailings.[^69] Once approved, it opens a bulk mailing permit where it will present mailings, or gives its authorization number to a mail service provider.[^20] It need not apply in the state where it received its Internal Revenue Code, the code the IRS assigns it.[^69] An organization may apply while the IRS is still assigning that code.[^69] A federal income tax exemption counts as evidence that an organization qualifies, but none is required.[^70] A church or religious organization may send Form 1023, its application to the IRS for recognition of exemption.[^69] The form must be signed and dated, with proof of payment to the IRS, and USPS uses it in place of the IRS letter.[^69] As of August 2024, USPS denies an application from any other organization without its code as `Premature`, or asks it to withdraw.[^69] > An authorized organization cannot lend its NPA to another organization.[^19] **Must.** An organization must not lend its Nonprofit Authorization to another organization. - **free matter for the blind or handicapped**, also called Domestic Matter for the Blind, Domestic Free Matter for the Blind: “Material mailed free of postage if mailed by or for the use of blind or other persons who cannot read or use conventionally printed materials because of a physical handicap. Such mail is not considered part of any particular mail class but is treated as First-Class Mail pieces solely for determining standards for processing and delivery and for handling if undeliverable. The mail must be marked “Free Matter for the Blind or Handicapped” in the upper right corner of the address side. Free matter is also available as an international service.”[^68] - **Nonprofit Authorization**, also called NPA, USPS Nonprofit Authorization: “Authorization to mail at the Nonprofit USPS Marketing Mail (nonprofit) prices is a privilege granted by law only to authorized organizations.”[^19] - **official mail**, also called government mail, U.S. government mail: “Mail authorized by federal law to be sent by U.S. government officials, often without postage prepayment. It includes franked mail sent by members of Congress and penalty mail sent by U.S. Government agencies.”[^65] - **penalty mail**: “Official mail sent without postage prepayment by officers of the executive and judicial branches of the U.S. government, by departments and agencies of the U.S. Government, and by specifically authorized individuals. Agencies then reimburse USPS for the penalty mail service they receive. USPS requires agencies to use penalty postage meters or other forms of direct accountability for proper reimbursement through the Official Mail Accounting System. The term comes from the endorsement “Penalty for Private Use” printed on the mail.”[^66] - **franked mail**: “Official mail sent without postage prepayment by members and members-elect of Congress, the vice president, and other authorized individuals. Mail must relate to the mailer’s official business, activities, and duties. The mailpiece bears a written signature, printed facsimile signature, or other required marking instead of a postage stamp.”[^67] - **Election Mail**, also called EM, Official Election Mail: “Any item mailed to or from authorized election officials that enables citizens to participate in the voting process — including ballots, voter registration cards, absentee voting applications, and polling place notifications.”[^62] - **Political Mail**, also called political campaign mail: “Any material mailed for campaign purposes by a registered political candidate, campaign committee, or committee of a political party, or political message mailing by a political action committee (PAC), super PAC, or other organization engaging in an effort to influence or drive voter mobilization.”[^64] ## How USPS decides a piece's class The Domestic Mail Manual is USPS's manual of standards for domestic mail services, price eligibility and mail preparation, with all postage prices and fees.[^31] The prices and fees USPS charges appear in Notice 123, the Price List.[^2][^71] The Mail Classification Schedule describes every product USPS offers to the public.[^1] The Pricing and Classification Service Center decides classification questions for mailers and for USPS field employees.[^32] National Customer Rulings is a voluntary program that issues classification decisions on proposed mailings before they reach a Business Mail Entry office.[^32] A [Customer Support Ruling](https://postalref.com/guides/getting-help.md) is USPS's official clarification of a mailing requirement, with examples of specific mailpieces.[^72] > Any parcels mailed as Package Service or USPS Marketing Mail cannot include content that requires First-Class Mail postage.[^73] **Must.** A parcel mailed as Package Services or USPS Marketing Mail must not hold anything that has to go at First-Class Mail postage. - **classification**: “The grouping of mailable matter into mail classes, products, and price categories, according to content, weight, size, and preparation standards as defined in the Mail Classification Schedule.”[^22] - **national customer ruling**, also called NCR: “A voluntary customer program administered by USPS that renders decisions on mailpiece design and price eligibility and issues a classification decision on the pieces in the mailer’s proposed mailing before it is presented at a business mail entry unit.”[^74] - **Price List (Notice 123)**: “The Price List is a 44-page publication that contains domestic and international prices and fees in a concise and accessible manner.”[^71] - **mail class**, also called class, class of mail: “The classification of domestic mail according to content (e.g., personal correspondence versus printed advertising) and other factors. It is codified in the Mail Classification Schedule. The term product, rather than mail class, is used for the divisions within competitive products.”[^1] - **Mail Classification Schedule**, also called MCS: “A description of every publicly available USPS product that forms a standard framework when reviewing, adding, modifying, or eliminating products.”[^1] - **Domestic Mail Manual**, also called DMM: “The USPS manual that contains the standards governing domestic mail services, descriptions of the mail classes and services and conditions governing their uses, standards for price eligibility and mail preparation, and all postage prices and fees.”[^31] ## What goes wrong An organization may not mail at nonprofit prices before its application is approved.[^75] Civil and criminal penalties apply to false, fictitious or fraudulent statements on a Nonprofit USPS Marketing Mail mailing.[^19] While its application is pending, an organization pays regular USPS Marketing Mail prices to qualify for a refund.[^75] Once authorized, it may be refunded what it paid above nonprofit prices on mailings entered while it waited, back to the authorization's effective date.[^75] That date is the later of the application date and the date the organization became eligible.[^75] No refund is made for mailings entered before the application, for postage paid at a price other than USPS Marketing Mail, or after a denial with no appeal.[^75] Material printed with the word `catalog` or another class's permit imprint is ineligible for [Periodicals](https://postalref.com/products/periodicals.md) prices.[^76] A postage statement whose pieces claim more than one [Election Mail or Political Mail](https://postalref.com/products/election-mail-and-political-mail.md) characteristic is identified as none of them.[^77] Business mailings cannot be entered at commercial prices until the [annual mailing fee](https://postalref.com/guides/paying-postage.md) is paid.[^78] First-Class Mail and USPS Marketing Mail each need their own, but a Periodicals permit has no annual fee.[^78][^40] A mailer can request an exception when a mailing misses USPS standards, but USPS grants no exceptions for prices.[^79] ## Index: 46 entries ### Mail classes (19) - [Bound Printed Matter](https://postalref.com/guides/mail-classes.md#packages) - [First-Class Mail](https://postalref.com/guides/mail-classes.md#correspondence) - [First-Class Package International Service](https://postalref.com/?q=First-Class%20Package%20International%20Service) - [free matter for the blind or handicapped](https://postalref.com/guides/mail-classes.md#special) - [Global Express Guaranteed](https://postalref.com/?q=Global%20Express%20Guaranteed) - [Library Mail](https://postalref.com/guides/mail-classes.md#packages) - [Media Mail](https://postalref.com/guides/mail-classes.md#packages) - [Package Services](https://postalref.com/guides/mail-classes.md#packages) - [Parcel Select](https://postalref.com/guides/mail-classes.md#packages) - [Parcel Select Ground](https://postalref.com/?q=Parcel%20Select%20Ground) - [Parcel Select Lightweight](https://postalref.com/?q=Parcel%20Select%20Lightweight) - [Periodicals](https://postalref.com/products/periodicals.md) - [Priority Mail](https://postalref.com/?q=Priority%20Mail) - [Priority Mail Express](https://postalref.com/guides/mail-classes.md#packages) - [Priority Mail Express International](https://postalref.com/?q=Priority%20Mail%20Express%20International) - [Priority Mail International](https://postalref.com/?q=Priority%20Mail%20International) - [USPS Ground Advantage](https://postalref.com/guides/mail-classes.md#packages) - [USPS Marketing Mail](https://postalref.com/guides/mail-classes.md#correspondence) - [USPS Retail Ground](https://postalref.com/?q=USPS%20Retail%20Ground) ### Service (1) - [National Zone Charts Matrix](https://postalref.com/guides/mail-classes.md#prices) ### Programs (2) - [Alternate Marked Copy Program](https://postalref.com/products/periodicals.md#terms) - [Periodicals Accuracy, Grading, and Evaluation](https://postalref.com/products/periodicals-accuracy-grading-and-evaluation-page-program.md) ### System (1) - [PAGE-certified software product](https://postalref.com/products/periodicals-accuracy-grading-and-evaluation-page-program.md#terms) ### File (1) - [marked copy](https://postalref.com/guides/mail-classes.md#correspondence) ### Identifier (1) - [Mail Class Code](https://postalref.com/guides/mail-classes.md#packages) ### Documents (4) - [International](https://postalref.com/?q=International) - [Price List (Notice 123)](https://postalref.com/guides/mail-classes.md#classification) - [PS Form 3510-M](https://postalref.com/?q=PS%20Form%203510-M) - [PS Form 3624](https://postalref.com/?q=PS%20Form%203624) ### Facility (1) - [Original Entry](https://postalref.com/?q=Original%20Entry) ### Terms (16) - [advertising portion](https://postalref.com/products/periodicals-accuracy-grading-and-evaluation-page-program.md#terms) - [automation price](https://postalref.com/guides/mail-classes.md#prices) - [Ballot Mail](https://postalref.com/products/election-mail-and-political-mail.md#terms) - [Bound Publications](https://postalref.com/products/periodicals.md#terms) - [classification](https://postalref.com/guides/mail-classes.md#classification) - [destination network distribution center price](https://postalref.com/?q=destination%20network%20distribution%20center%20price) - [Election Mail](https://postalref.com/guides/mail-classes.md#special) - [Election Mail - Non-Ballot Materials](https://postalref.com/?q=Election%20Mail%20-%20Non-Ballot%20Materials) - [Election Mail - Official Ballots](https://postalref.com/?q=Election%20Mail%20-%20Official%20Ballots) - [Known Office of Publication](https://postalref.com/guides/mail-classes.md#correspondence) - [mailing fee](https://postalref.com/?q=mailing%20fee) - [national customer ruling](https://postalref.com/guides/mail-classes.md#classification) - [nonadvertising portion](https://postalref.com/products/periodicals-accuracy-grading-and-evaluation-page-program.md#terms) - [Nonprofit Authorization](https://postalref.com/guides/mail-classes.md#special) - [Political Mail](https://postalref.com/guides/mail-classes.md#special) - [Return Ballot Mail](https://postalref.com/products/election-mail-and-political-mail.md#terms) ## Sources [^1]: [Publication 32: Glossary of Postal Terms](https://postalpro.usps.com/mnt/glusterfs/2016-04/pub32_glossary.pdf#page=125), page 121: “The classification of domestic mail according to content (e.g., personal correspondence versus printed advertising) and other factors. … The term product, rather than mail class, is used for the divisions within competitive products. … A description of every publicly available USPS product that forms a standard framework when reviewing, adding, modifying, or eliminating products. … The classification of domestic mail according to content (e.g., personal correspondence versus printed advertising) and other factors. It is codified in the Mail Classification Schedule. The term product, rather than mail class, is used for the divisions within competitive products.” [^2]: [Appendix C: ACS™ Product Code Information and Details](https://postalpro.usps.com/mnt/glusterfs/2024-12/AppendixC_ACSProductCodeInfoandDetails.pdf#page=6), page 5: “A class of mail that includes all matter wholly or partly in writing or typewriting, all actual and personal correspondence, all bills and statements of account, and all matter sealed or otherwise closed against inspection. … These subclasses include circulars, printed matter, pamphlets, catalogs, newsletters, direct mail, and merchandise. … A class of mail that weighs less than 16 ounces. … a commercial based product typically containing gifts and merchandise that can be sent using Parcel Select. … class of mail that comprises three subclasses: Bound Printed Matter, Library Mail, and Media Mail. … A class of mail consisting of magazines, newspapers, or other publications formed of printed sheets that are issued at least four times a year at regular, specified intervals (frequency) from a known office of publication. … A class of mail that weighs less than 16 ounces. It comprises the subclasses of Regular Marketing Mail, Nonprofit Marketing Mail, Carrier Route Marketing Mail, and Nonprofit Carrier Route Marketing Mail. These subclasses include circulars, printed matter, pamphlets, catalogs, newsletters, direct mail, and merchandise. … Bound Printed Matter is typically catalogs, directories, books, and other printed material that weigh up to 15 pounds and meet specific eligibility standards … Actual fees and postage charged is identified in DMM Notice 123.” [^3]: [Publication 32: Glossary of Postal Terms](https://postalpro.usps.com/mnt/glusterfs/2016-04/pub32_glossary.pdf#page=242), page 238: “A price structure for certain Priority Mail Express, Priority Mail, Periodicals (except for the nonadvertising portion), Package Services (Standard Post and Bound Printed Matter services), and Parcel Select products that is based on weight and distance traveled (or zones crossed). … A table that identifies the appropriate distance code (i.e., zone) assigned to each originating and destination pairing for every ZIP Code area in the nation.” [^4]: [Publication 32: Glossary of Postal Terms](https://postalpro.usps.com/mnt/glusterfs/2016-04/pub32_glossary.pdf#page=48), PDF page 48: “(1) A general term that distinguishes postage prices such as presorted or automation prices available to mailers who meet various preparation requirements and minimum volumes versus retail prices (i.e., single-piece prices) available to the public and not requiring special preparation or minimum volumes. … (1) A general term that distinguishes postage prices such as presorted or automation prices available to mailers who meet various preparation requirements and minimum volumes versus retail prices (i.e., single-piece prices) available to the public and not requiring special preparation or minimum volumes. (2) Commercial Base and Commercial Plus prices.” [^5]: [Publication 32: Glossary of Postal Terms](https://postalpro.usps.com/mnt/glusterfs/2016-04/pub32_glossary.pdf#page=207), page 203: “Stated delivery performance goals for each mail class and product that are usually measured by days for the period of time taken by USPS to handle the mail from end-to-end (that is, from the point of entry into the mailstream to delivery to the final destination).” [^6]: [SD Data Security Considerations and Comparisons Guidance](https://postalpro.usps.com/mnt/glusterfs/2025-05/SD%20Data%20Security%20Considerations%20and%20Comparisons%20Guidance%20ver%203%20May%2030%202020.pdf#page=1), page 1: “First class mail (FCM), by definition, is a protected class of mail by law. … Those protections are why the federal government, such as the US Department of State and the US Treasury, identify USPS FCM in their data security regulations as an acceptable method for transmitting “Secret,” “Highly Classified” and “Classified” information.” [^7]: [Publication 32: Glossary of Postal Terms](https://postalpro.usps.com/mnt/glusterfs/2016-04/pub32_glossary.pdf#page=184), page 180: “Priority Mail service is closed against postal inspection. … An expedited service for shipping any mailable matter, subject to certain standards such as size and weight limits. … Unless Priority Mail Express service is used, Priority Mail prices are required for a mailpiece that weighs more than 13 ounces when the mailpiece contains matter that must be mailed at First-Class Mail prices. … Except for Flat Rate Envelopes, Flat Rate Boxes, Critical Mail, and Commercial Plus Cubic, Priority Mail postage is charged for each addressed piece according to weight (up to 70 pounds), zone, and, in some cases, dimensions.” [^8]: [Publication 32: Glossary of Postal Terms](https://postalpro.usps.com/mnt/glusterfs/2016-04/pub32_glossary.pdf#page=185), page 181: “Priority Mail Express service is closed against postal inspection. … An expedited service for shipping any mailable matter, subject to certain standards such as size and weight limits and certain hazardous materials restrictions, with a money-back guarantee for next-day or second-day delivery in most cases. … Except for Flat Rate Envelopes, Priority Mail Express postage is charged for each addressed piece according to its weight and zone. … An expedited international service with additional features that is available to over 190 countries, providing delivery to foreign cities in most cases within 3 to 5 days.” [^9]: [Publication 32: Glossary of Postal Terms](https://postalpro.usps.com/mnt/glusterfs/2016-04/pub32_glossary.pdf#page=30), page 26: “A Package Services product weighing not more than 15 pounds that consists of permanently bound sheets of which at least 90% are printed with advertising, promotional, directory, or editorial matter (or a combination of such matter). … Examples include book, catalog, and telephone directory.” [^10]: [Notice 123: Price List (effective October 4, 2026)](https://pe.usps.com/text/dmm300/Notice123.htm): “Commercial Large Envelopes (Flats) Nonpresorted | Weight Not Over (lbs.) | Per Piece4 | … | None | DSCF | DDU | None | DSCF | DDU | … Notice 123 • Effective October 04, 2026 … Flat Rate Envelope: $38.25 Legal Flat Rate Envelope: $38.55 Padded Flat Rate Envelope: $39.25 … Letters (Stamped)1,4 | Weight Not Over (oz.) | | | --- | --- | | 1 | $0.82 | | 2 | 1.11 | | 3 | 1.40 | | 3.5 | 1.69 | … Letters (Metered)1,4 | Weight Not Over (oz.) | | | --- | --- | | 1 | $0.78 | | 2 | 1.07 | | 3 | 1.36 | | 3.5 | 1.65 | … Postcards3 | | | --- | | $0.65 | … Large Envelopes (Flats)2 | Weight Not Over (oz.) | | | --- | --- | | 1 | $1.69 | … | 13 | 5.24 | … | Price Groups | Canada 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | … | Flat Rate Envelopes (Max. Wt. 4 lbs.) | $32.65 | $48.80 | $49.75 | $54.55 | $52.30 | $53.00 | $62.35 | $50.55 | … | Canada 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | … | 1 | $43.55 | $61.45 | $69.40 | $70.40 | $71.70 | $66.25 | $67.05 | $65.75 | $68.35 | $63.05 | … | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | … | 1 | $65.05 | $70.65 | $72.15 | $65.20 | $69.50 | $82.30 | $66.05 | $68.50 | $83.15 | $69.70 | … | Price Groups | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | … | Flat Rate Envelopes (Max. Wt. 4 lbs.) | $62.70 | $83.35 | $79.80 | $85.20 | $87.10 | $89.20 | $102.50 | $80.85 | … | Weight Not Over (lbs.) | Price Group |” [^11]: [PRC: Mail Classification Schedule through July 12, 2026 (docx, converted to HTML with mammoth)](https://www.prc.gov/sites/default/files/mcs/MCS%20Through%2007122026.docx): “Carrier Route + DDU + DSCF * Presorted + DDU + DSCF * Nonpresorted … Outbound Single-Piece First-Class Mail International consists of outbound international letter and flat-shaped pieces (destined for delivery outside of the United States) that are subject to the provisions of the Universal Postal Convention of the Universal Postal Union and that are not entered as Priority Mail International. … Large Envelopes (Flats) … and at least one dimension exceeds | 11.5 inches | 6.125 inches | 0.25 inch … Maximum | 15 inches | 12 inches | 0.75 inch | 13 ounces … All Others | 130 inches in combined length and girth | | | 70 pounds … Any mailable matter may be mailed as USPS Ground Advantage Retail mail. … Postage for USPS Ground Advantage Commercial mail must be paid for by one of the following methods: … Registered end-users of USPS-approved PC Postage products when using a qualifying shipping label managed by PC Postage system. … USPS-approved IBI postage meters that electronically transmit transactional data to the USPS. … Permit imprint. … Zone/Cube – Prices are based on cubic size and zone … Maximum Cubic | Various, not to exceed 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, or 1.0 cubic feet | | | 20 pounds … USPS Tracking service provides mailers of USPS Marketing Mail parcels, Package Services, Priority Mail, Parcel Select, and USPS Ground Advantage pieces with end-to-end tracking updates, including confirmation of delivery, as the item travels to its destination. … Insurance, up to $100.00, is included in Priority Mail Express postage. … Up to $100.00 of General Insurance coverage is included at no additional cost in the price of Priority Mail pieces that bear an Intelligent Mail package barcode or retail tracking barcode. … Up to $100.00 of General Insurance coverage is included at no additional cost in the price of USPS Ground Advantage pieces that bear an Intelligent Mail package barcode or retail tracking barcode … USPS Tracking service is automatically included with the purchase of items sent via Package Services, Priority Mail, Parcel Select, and USPS Ground Advantage. … USPS Tracking service does not include the collection of any recipient signatures. … Insurance may be obtained only at the time of mailing and provides the mailer with indemnity for loss, damage, or missing contents for merchandise mailed using Priority Mail Express, Package Services, Parcel Select, USPS Marketing Mail parcels, or items included in pieces sent via First-Class Mail USPS Ground Advantage, or Priority Mail, if the contents would be eligible to be mailed using USPS Marketing Mail, USPS Retail Ground, or Package Services. … Maximum | 11.5 inches | 6.125 inches | 0.25 inch | 3.5 ounces … Maximum | 15 inches | 12 inches | 0.75 inches | 15.994 ounces … Outbound Single-Piece First-Class Package International Service consists of outbound international packages and rolls (destined for delivery outside of the United States). … Nonnegotiable document reconstruction up to $100.00 and merchandise insurance up to $200.00 is included in the price of postage. … Priority Mail Express International with guarantee service provides a postage-refund guarantee for date-certain delivery to a limited number of foreign destinations.” [^12]: [Publication 32: Glossary of Postal Terms](https://postalpro.usps.com/mnt/glusterfs/2016-04/pub32_glossary.pdf#page=67), page 63: “Periodicals, Parcel Select, and Bound Printed Matter prices for pieces properly prepared and entered by the mailer at the sectional center facility (SCF) or other postal facility designated as an SCF that serves the delivery address on the pieces. … A postage price lower than the related nonentry price for mail that a mailer transports directly to a postal facility. Generally, the closer the facility is to the final delivery, the lower the price.” [^13]: [Publication 32: Glossary of Postal Terms](https://postalpro.usps.com/mnt/glusterfs/2016-04/pub32_glossary.pdf#page=66), page 62: “Periodicals, Parcel Select, and Bound Printed Matter prices for pieces properly prepared and entered by the mailer at the delivery unit that serves the delivery address on the pieces.” [^14]: [PostalPro: National Zone Charts Matrix](https://postalpro.usps.com/address-quality/national-zone-charts-matrix): “The National Zone Charts Matrix assists mailers in determining the distance that a mailpiece travels based on the ZIP Code™ where the mailpiece enters the mailstream (origination) and the ZIP Code that will deliver the mailpiece to the addressee (destination). … Postage rates for zoned mail are based on mailpiece weight and the distance the mailpiece travels using these zone assignments. … Please note, the matrix does not contain postage rates, only zone information.” [^15]: [USPS Report on Form 10-K, fiscal year 2025](https://about.usps.com/what/financials/10k-reports/fy2025.pdf#page=7), PDF page 7: “USPS Ground Advantage - This ground shipping sub-category provides a simple, reliable, and affordable way to ship packages weighing up to 70 pounds with day specific (non-guaranteed) delivery in 2 to 5 days across the continental U.S. … Priority Mail Services - This sub-category includes Priority Mail, which is offered as a service both within the U.S. and abroad with the domestic, day-specified (non-guaranteed) delivery, and Priority Mail Express, which offers an overnight to 2-day delivery with money-back guaranteed services to most U.S. destinations 365 days a year. … First-Class Mail - This category encompasses letters, cards, or large envelopes destined for either domestic (up to 13 ounces) or international (up to nearly 1 pound) delivery. … Both Priority Mail and Priority Mail Express include basic insurance up to $100, tracking, and proof of delivery services. … This ground shipping sub-category provides a simple, reliable, and affordable way to ship packages weighing up to 70 pounds with day specific (non-guaranteed) delivery in 2 to 5 days across the continental U.S. … Market-Dominant services include First-Class Mail, Marketing Mail, Periodicals, some types of International mail, Package Services, and certain other services. … Prices in effect since August 29, 2021, are subject to a price cap system partially based on the increase in the CPI-U, but also allowing for some additional pricing flexibility and authority, including a density-based rate authority, retirement-based rate authority, and authority for non-compensatory classes.” [^16]: [Federal Register: Domestic Competitive Products Pricing and Mailing Standards Changes, USPS Ground Advantage (88 FR 32824, May 22, 2023)](https://www.govinfo.gov/content/pkg/FR-2023-05-22/html/2023-10353.htm): “First-Class Package Service Rebranded as USPS Ground Advantage … DATES: Effective July 9, 2023.” [^17]: [Publication 32: Glossary of Postal Terms](https://postalpro.usps.com/mnt/glusterfs/2016-04/pub32_glossary.pdf#page=136), page 132: “A Package Services product that consist of books, sheet music, printed educational material, film, sound recordings, and computer prerecorded media such as CD-ROMs. … Media Mail prices are based on the weight of the piece without regard to zone. … Advertising restrictions apply. … A Package Services product that consist of books, sheet music, printed educational material, film, sound recordings, and computer prerecorded media such as CD-ROMs. Advertising restrictions apply. Media Mail prices are based on the weight of the piece without regard to zone.” [^18]: [Election Mail Permit Based Solutions](https://postalpro.usps.com/mnt/glusterfs/2022-07/2022.07.22_Election%20Mail%20Permit%20Based%20Solutions_v1.pdf#page=1), PDF page 1: “To qualify for business mail postage discounts, a minimum number of pieces is required per mailing: … 200 pieces (or 50 pounds of mail) for USPS Marketing Mail … 500 pieces for First-Class Mail” [^19]: [USPS Nonprofit Marketing Mail Fact Sheet ](https://postalpro.usps.com/mnt/glusterfs/2024-08/Nonprofit%20Fact%20Sheet.v2.pdf#page=1), PDF page 1: “Authorization to mail at the Nonprofit USPS Marketing Mail (nonprofit) prices is a privilege granted by law only to authorized organizations. … Nonprofit USPS Marketing Mail prices are discounted approximately 40% from regular USPS Marketing Mail prices. … Only one NPA (Nonprofit Authorization) per organization name. … An authorized organization cannot lend its NPA to another organization. … Civil and criminal penalties apply to false, fictitious, or fraudulent statements made in connection with a Nonprofit USPS Marketing Mail mailing.” [^20]: [USPS Nonprofit Authorizations - Frequently Asked Questions](https://postalpro.usps.com/mnt/glusterfs/2024-08/NONPROFIT%20FAQ.v2.pdf#page=1), PDF page 1: “Submit your nonprofit application through the Business Customer Gateway (BCG) at https://gateway.usps.com. … If you have no access to a computer or internet, you may go to your local Business Mail Entry Office (BMEU) or local post office to obtain a PS Form 3624 – Application to Mail Nonprofit USPS Marketing Mail Prices. … Once the Pricing & Classification Service Center (PCSC) receives the application in the queue, it will be assigned to a Nonprofit Specialist for an eligibility review. … It may take up to 14 days to complete the review. … A bulk mailing permit can be opened at the Post Office or Business Mail Entry Unit (BMEU) where the organization plans on presenting mailings. … The organization will provide their Nonprofit Authorization (NPA) Number to the MSP in order to obtain the Nonprofit USPS Marketing Mail prices.” [^21]: [PS Form 3624: Application to Mail at Nonprofit USPS Marketing Mail Prices (January 2017)](https://about.usps.com/forms/ps3624.pdf#page=2), PDF page 2: “Only organizations may apply. Individuals may not apply (except voting registration officials). … The application must be signed by someone in authority in the organization, such as the president or treasurer. It must not be signed by a printer or mailing agent.” [^22]: [Publication 32: Glossary of Postal Terms](https://postalpro.usps.com/mnt/glusterfs/2016-04/pub32_glossary.pdf#page=43), page 39: “The grouping of mailable matter into mail classes, products, and price categories, according to content, weight, size, and preparation standards as defined in the Mail Classification Schedule.” [^23]: [Publication 32: Glossary of Postal Terms](https://postalpro.usps.com/mnt/glusterfs/2016-04/pub32_glossary.pdf#page=183), page 179: “A subdivision of a class or product by type of price such as single-piece, presorted, and automation prices or retail, Commercial Base, and Commercial Plus prices. … For market dominant products, the law caps price modifications at the class level to the annual Consumer Price Index. … For competitive products, USPS is free to price these products as long as they cover their costs, are not subsidized by the market dominant products, and make an appropriate contribution to institutional costs. … A subdivision of a class or product by type of price such as single-piece, presorted, and automation prices or retail, Commercial Base, and Commercial Plus prices. For example, the First-Class Mail product Presorted Letters/ Postcards has three price categories: nonmachinable, machinable, and automation.” [^24]: [Publication 32: Glossary of Postal Terms](https://postalpro.usps.com/mnt/glusterfs/2016-04/pub32_glossary.pdf#page=49), page 45: “A category of postal products and services (commonly referred to as shipping services) for which similar products and services are offered by private sector carriers. … Competitive products include Priority Mail Express service, Priority Mail service, Parcel Select service, Parcel Return Service, Premium Forwarding Service, and most international mail products except First-Class Mail International service, which is categorized as a market dominant product. … A category of postal products and services (commonly referred to as shipping services) for which similar products and services are offered by private sector carriers. Pricing changes occur annually, and USPS is free to price competitive products as long as they cover their costs, are not subsidized by market dominant products (also known as mailing services), and make an appropriate contribution to institutional costs. Competitive products include Priority Mail Express service, Priority Mail service, Parcel Select service, Parcel Return Service, Premium Forwarding Service, and most international mail products except First-Class Mail International service, which is categorized as a market dominant product.” [^25]: [PostalPro: Periodicals](https://postalpro.usps.com/periodicals): “The Periodicals class of mail is designed for newspapers, magazines, and other periodical publications whose primary purpose is transmitting information to an established list of subscribers or requesters. … The Postal Service requires publishers, qualifying for Periodicals mailing privileges, to provide the percentage of advertising and non-advertising content for each issue to determine the pound price charge (DMM 207.2.1.5) of the mailing.” [^26]: [Publication 32: Glossary of Postal Terms](https://postalpro.usps.com/mnt/glusterfs/2016-04/pub32_glossary.pdf#page=165), page 161: “A certification process that evaluates the accuracy of publication and print planning (ppp) software in calculating the copy weight and percentage of advertising in a publication according to mailing requirements that determine eligibility and pricing.” [^27]: [Publication 205 Electronic Verification System (eVS®) Business and Technical Guide](https://postalpro.usps.com/mnt/glusterfs/2024-07/eVS_pub205_July_2024_0.pdf#page=10), page 2: “2023 USPS Ground Advantage replaces First-Class Package Service and Parcel Select Ground” [^28]: [Publication 32: Glossary of Postal Terms](https://postalpro.usps.com/mnt/glusterfs/2016-04/pub32_glossary.pdf#page=111), page 107: “Mail originating in one country and destinating in another. … The directive that contains official prices and standards for all international mail services.” [^29]: [Publication 32: Glossary of Postal Terms](https://postalpro.usps.com/mnt/glusterfs/2016-04/pub32_glossary.pdf#page=26), PDF page 26: “A price category for mail that is presorted and prebarcoded and that meets addressing, readability, and other requirements for mail that can be processed on automated equipment. … Automation prices are generally lower than prices for single-piece mail or nonautomation presorted mail. … A price category for mail that is presorted and prebarcoded and that meets addressing, readability, and other requirements for mail that can be processed on automated equipment. Automation prices are generally lower than prices for single-piece mail or nonautomation presorted mail.” [^30]: [PostalPro: Election Mail and Political Mail](https://postalpro.usps.com/mailing/election-political-mail): “Election Mail is any item mailed to or from authorized election officials that enables citizens to participate in the voting process, such as ballots, sample ballots, voter registration cards, absentee ballot applications, and polling place notifications.” [^31]: [Appendix D: Glossary of ACS™ Acronyms and Terminology](https://postalpro.usps.com/mnt/glusterfs/2018-02/AppendixD_GlossaryACSTermsAcronyms.pdf#page=5), PDF page 5: “The USPS manual that contains the standards governing domestic mail services, descriptions of the mail classes and services and conditions governing their uses, standards for price eligibility and mail preparation, and all postage prices and fees.” [^32]: [PostalPro: Pricing and Classification Service Center](https://postalpro.usps.com/pcsc): “The Pricing and Classification Service Center (PCSC) is a national center that provides one source for mail classification decisions which serves both external customers and field employees in need of direction on price application, mail eligibility and mailing standards. … National Customer Rulings is a voluntary program that provides national mailers with guidance and support on mailpiece design and price eligibility. … The program issues classification decisions on proposed mailings before they are presented at a Business Mail Entry office.” [^33]: [Publication 32: Glossary of Postal Terms](https://postalpro.usps.com/mnt/glusterfs/2016-04/pub32_glossary.pdf#page=89), page 85: “Any mailable matter may be sent by First-Class Mail service.” [^34]: [DMM 503: Extra Services](https://pe.usps.com/text/dmm300/503.htm): “provide optional services, such as insurance coverage, restricted delivery, and evidence of mailing, or a record of delivery (which includes a signature). … Certified Mail provides the sender with a mailing receipt and, upon request, electronic verification that an article was delivered or that a delivery attempt was made. … Registered Mail is the most secure service that the USPS offers. It incorporates a system of receipts to monitor the movement of the mail from the point of acceptance to delivery. … | **Priority Mail** **First-Class Mail** **USPS Ground Advantage — Commercial** **USPS Ground Advantage — Retail** | **Return Receipt** **Signature Confirmation** | … USPS maintains a record of delivery (which includes the recipient’s signature). Customers may obtain a delivery record by purchasing a return receipt … Customers may obtain a record of delivery (which includes the recipient’s signature) by purchasing a return receipt … A return receipt may be purchased at the time of mailing and provides a mailer with evidence of delivery (to whom the mail was delivered and date of delivery), and information about the recipient’s actual delivery address.” [^35]: [Publication 32: Glossary of Postal Terms](https://postalpro.usps.com/mnt/glusterfs/2016-04/pub32_glossary.pdf#page=10), page 6: “Mail that requires the signature of the addressee or addressee’s agent upon receipt to provide evidence of delivery or indemnification for loss or damage. Accountable mail includes Priority Mail Express service and Special Service mail such as Certified Mail, Collect on Delivery, Insured Mail for more than $200, Registered Mail, Return Receipt, and Signature Confirmation.” [^36]: [Publication 199: Intelligent Mail Package Barcode (IMpb) Implementation Guide for Confirmation Services and Electronic Payment Systems](https://postalpro.usps.com/mnt/glusterfs/2026-07/Pub%20199_v35_07022026.pdf#page=83), page 84: “Only mailable matter prepaid with postage at First-Class Mail or Priority Mail prices may be sent as Certified Mail.” [^37]: [Intelligent Mail® Package Barcode (IMpb) ACS™ Technical Guide](https://postalpro.usps.com/mnt/glusterfs/2024-02/IMpb_ACS_Technical_Guide.pdf#page=3), page 3: “On January 22, 2017, Standard Mail® underwent a name change and was rebranded as USPS Marketing Mail™” [^38]: [Publication 32: Glossary of Postal Terms](https://postalpro.usps.com/mnt/glusterfs/2016-04/pub32_glossary.pdf#page=216), page 212: “A mail class consisting of eligible matter that is not required to be mailed using First-Class Mail or Periodicals service.” [^39]: [Publication 32: Glossary of Postal Terms](https://postalpro.usps.com/mnt/glusterfs/2016-04/pub32_glossary.pdf#page=210), PDF page 210: “It is not available for Standard Mail or Periodicals pieces. … Single-piece prices are available to the general public and to commercial mailers and require no special sortation.” [^40]: [Periodicals: Application Process - Frequently Asked Questions](https://postalpro.usps.com/mnt/glusterfs/2024-08/Periodicals_Application_Process_FAQ.v1.pdf#page=1), PDF page 1: “Publishers supply a copy of the issue to be reviewed, with all advertising marked so the advertising content can be verified by the USPS. … Is there an annual fee associated with having a Periodicals permit? A5. No.” [^41]: [PostalPro: Periodicals Accuracy Grading and Evaluation (PAGE) Program](https://postalpro.usps.com/certifications/page): “PAGE certification allows Periodicals mailers to forego the submission of marked copies for every edition of every issue, unless otherwise requested by postal officials.” [^42]: [Publication 32: Glossary of Postal Terms](https://postalpro.usps.com/mnt/glusterfs/2016-04/pub32_glossary.pdf#page=115), page 111: “The business office of a Periodicals publication that is in the city where the original entry for Periodicals mailing privileges is authorized.” [^43]: [INFORMATIONAL - Adjustments to Priority Mail and USPS Ground Advantage Service Expectations for Noncontiguous States and Territories](https://postalpro.usps.com/mnt/glusterfs/2026-09/INFORMATIONAL%20-%20Adjustments%20to%20Priority%20Mail%20and%20USPS%20Ground%20Advantage%20for%20Noncontiguous%20States%20and%20Territories.pdf#page=2), PDF page 2: “USPS Ground Advantage packages between the contiguous United States and the following locations will have a 10-day or more service expectation: Alaska, Hawaii, American Samoa, Puerto Rico, United States Virgin Islands, Guam, Northern Mariana Islands and the Freely Associated States. … Regardless of weight, noncontiguous USPS Ground Advantage packages will now primarily utilize surface transportation.” [^44]: [INFORMATIONAL - Adjustments to Priority Mail and USPS Ground Advantage Service Expectations for Noncontiguous States and Territories](https://postalpro.usps.com/mnt/glusterfs/2026-09/INFORMATIONAL%20-%20Adjustments%20to%20Priority%20Mail%20and%20USPS%20Ground%20Advantage%20for%20Noncontiguous%20States%20and%20Territories.pdf#page=1), PDF page 1: “Effective October 1, 2026, the Postal Service is adjusting service expectations for Priority Mail and USPS Ground Advantage packages for noncontiguous states and territories of the United States.” [^45]: [Publication 199: Intelligent Mail Package Barcode (IMpb) Implementation Guide for Confirmation Services and Electronic Payment Systems](https://postalpro.usps.com/mnt/glusterfs/2026-07/Pub%20199_v35_07022026.pdf#page=460), page 461: “First-Class/USPS Ground Advantage … Global Express Guaranteed” [^46]: [DMM 125: Retail Priority Mail, Mail Preparation](https://pe.usps.com/text/dmm300/125.htm): “Priority Mail packaging provided by the USPS must be used only for Priority Mail. … The mailer of any material mailed in USPS-provided Priority Mail packaging, regardless of how the packaging is reconfigured or how markings may be obliterated, is charged the appropriate Priority Mail price.” [^47]: [DMM 126: Retail Priority Mail, Deposit](https://pe.usps.com/text/dmm300/126.htm): “Priority Mail pieces that weigh 10 ounces or less and measure one half-inch or less in thickness may be deposited into any collection box, mail chute, or mail receptacle, or at any place where mail is accepted if the full required postage is paid with postage stamps. … The sender must present such items to an employee at a retail service counter in a Postal Service facility. … Priority Mail pieces bearing only postage stamps as postage payment and that weigh more than 10 ounces or measure more than one half-inch in thickness may not be deposited into a collection box, Postal Service lobby drop, Postal Service dock, customer mailbox, or other unattended location.” [^48]: [DMM 136: Retail First-Class Mail and USPS Ground Advantage Retail, Deposit](https://pe.usps.com/text/dmm300/136.htm): “Retail First-Class Mail (letters, cards, flats) and USPS Ground Advantage — Retail must be deposited as follows: … Except as provided in 1.0b, items may be deposited into any collection box, mail receptacle, or at any place where mail is accepted if the full required postage is paid with postage stamps. … Items bearing only postage stamps as postage payment and that weigh more than 10 ounces, or measure more than one half-inch in thickness, may not be deposited into any collection box, picked up during the normal delivery and collection of mail, or through Pickup on Demand service.” [^49]: [Publication 205 Electronic Verification System (eVS®) Business and Technical Guide](https://postalpro.usps.com/mnt/glusterfs/2024-07/eVS_pub205_July_2024_0.pdf#page=24), page 16: “Priority Mail, Priority Mail Express, USPS Ground Advantage, and Parcel Select parcels exceeding 1,728 cubic inches are priced on actual weight or dimensional weight, whichever is greater.” [^50]: [Publication 32: Glossary of Postal Terms](https://postalpro.usps.com/mnt/glusterfs/2016-04/pub32_glossary.pdf#page=119), page 115: “A Package Services product for items sent to or from or exchanged between academic institutions, public libraries, museums, and other authorized organizations.” [^51]: [USPS Report on Form 10-K, fiscal year 2025](https://about.usps.com/what/financials/10k-reports/fy2025.pdf#page=8), PDF page 8: “These services include: Certified Mail, Registered Mail, Signature Confirmation, Adult Signature, and insurance up to $5,000. … First-Class Package International Service, Priority Mail Express International, and Priority Mail International services compete in the e-commerce cross-border business.” [^52]: [Publication 199: Intelligent Mail Package Barcode (IMpb) Implementation Guide for Confirmation Services and Electronic Payment Systems](https://postalpro.usps.com/mnt/glusterfs/2026-07/Pub%20199_v35_07022026.pdf#page=146), page 147: “A two-character code for Class of Mail.” [^53]: [Postal Bulletin 22660: IMM revision, Changes to Global Express Guaranteed Service (Oct 3, 2024)](https://about.usps.com/postal-bulletin/2024/pb22660/html/updt_002.htm): “Effective September 29, 2024, Global Express Guaranteed® (GXG®) service was suspended to all destinations. … Until further notice, Post Office® facilities will not accept GXG items for any destination.” [^54]: [DMM 253: Parcel Select, Prices and Eligibility](https://pe.usps.com/text/dmm300/253.htm): “Parcel Select is a Shipping Services ground product.” [^55]: [Publication 32: Glossary of Postal Terms](https://postalpro.usps.com/mnt/glusterfs/2016-04/pub32_glossary.pdf#page=186), PDF page 186: “An international product similar to the domestic Priority Mail product. Prices are based on weight and destination country.” [^56]: [Publication 32: Glossary of Postal Terms](https://postalpro.usps.com/mnt/glusterfs/2016-04/pub32_glossary.pdf#page=98), PDF page 98: “The premium international expedited delivery service that is a business alliance between USPS and FedEx Express. … GXG service is guaranteed to meet destination-specific delivery standards or the postage may be refunded.” [^57]: [IMM 211 Global Express Guaranteed, Description and Physical Characteristics (as online Nov 2026)](https://pe.usps.com/text/imm/immc2_002.htm): “Note: Global Express Guaranteed service is suspended as of September 29, 2024.” [^58]: [Publication 32: Glossary of Postal Terms](https://postalpro.usps.com/mnt/glusterfs/2016-04/pub32_glossary.pdf#page=152), PDF page 152: “(1) A preferred price for a Periodicals publisher authorized as a nonprofit organization. (2) A lower Standard Mail price for qualified organizations and national and state political committees.” [^59]: [Publication 32: Glossary of Postal Terms](https://postalpro.usps.com/mnt/glusterfs/2016-04/pub32_glossary.pdf#page=202), page 198: “A carrier route price for Standard Mail and Periodicals letters and flats that requires preparing the mail in walk sequence, with mail to 90% or more of the active residential addresses or 75% or more of the total number of active possible delivery addresses per route receiving this mail.” [^60]: [Publication 32: Glossary of Postal Terms](https://postalpro.usps.com/mnt/glusterfs/2016-04/pub32_glossary.pdf#page=134), PDF page 134: “Postal products and services (commonly referred to as mailing services) over which USPS exercises sufficient market power that it can effectively set their price with limited competition.” [^61]: [USPS Report on Form 10-K, fiscal year 2025](https://about.usps.com/what/financials/10k-reports/fy2025.pdf#page=16), PDF page 16: “The PAEA subjected our Market-Dominant services to a price cap rigidly tied to the CPI-U, but the PAEA also required the PRC to review that price-cap system after 10 years and to modify or replace it as necessary to allow the achievement of financial stability and other statutory objectives.” [^62]: [Ballot Mail & Political Mail STIDs Fact Sheet](https://postalpro.usps.com/mnt/glusterfs/2025-10/23108_BALLOT%20MAIL%20AND%20POLITICAL%20MAIL_STID%20Tables%20Fact%20Sheet_Jan%202024%20Final(508-Compliant).pdf#page=1), PDF page 1: “Return Ballot Mail (i.e., ballots that voters return to election officials) is sent at First-Class Mail prices, unless a voter opts to pay for a premium service. … Any item mailed to or from authorized election officials that enables citizens to participate in the voting process — including ballots, voter registration cards, absentee voting applications, and polling place notifications.” [^63]: [Ballot Mail & Political Mail STIDs Fact Sheet](https://postalpro.usps.com/mnt/glusterfs/2025-10/23108_BALLOT%20MAIL%20AND%20POLITICAL%20MAIL_STID%20Tables%20Fact%20Sheet_Jan%202024%20Final(508-Compliant).pdf#page=2), PDF page 2: “We strongly recommend the use of First-Class Mail service for all ballots.” [^64]: [Ballot Mail & Political Mail STIDs Fact Sheet](https://postalpro.usps.com/mnt/glusterfs/2025-10/23108_BALLOT%20MAIL%20AND%20POLITICAL%20MAIL_STID%20Tables%20Fact%20Sheet_Jan%202024%20Final(508-Compliant).pdf#page=3), PDF page 3: “Any material mailed for campaign purposes by a registered political candidate, campaign committee, or committee of a political party, or political message mailing by a political action committee (PAC), super PAC, or other organization engaging in an effort to influence or drive voter mobilization.” [^65]: [Publication 32: Glossary of Postal Terms](https://postalpro.usps.com/mnt/glusterfs/2016-04/pub32_glossary.pdf#page=154), PDF page 154: “Mail authorized by federal law to be sent by U.S. government officials, often without postage prepayment. It includes franked mail sent by members of Congress and penalty mail sent by U.S. Government agencies.” [^66]: [Publication 32: Glossary of Postal Terms](https://postalpro.usps.com/mnt/glusterfs/2016-04/pub32_glossary.pdf#page=164), page 160: “Agencies then reimburse USPS for the penalty mail service they receive. … Official mail sent without postage prepayment by officers of the executive and judicial branches of the U.S. government, by departments and agencies of the U.S. Government, and by specifically authorized individuals. Agencies then reimburse USPS for the penalty mail service they receive. USPS requires agencies to use penalty postage meters or other forms of direct accountability for proper reimbursement through the Official Mail Accounting System. The term comes from the endorsement “Penalty for Private Use” printed on the mail.” [^67]: [Publication 32: Glossary of Postal Terms](https://postalpro.usps.com/mnt/glusterfs/2016-04/pub32_glossary.pdf#page=95), page 91: “The mailpiece bears a written signature, printed facsimile signature, or other required marking instead of a postage stamp. … Official mail sent without postage prepayment by members and members-elect of Congress, the vice president, and other authorized individuals. Mail must relate to the mailer’s official business, activities, and duties. The mailpiece bears a written signature, printed facsimile signature, or other required marking instead of a postage stamp.” [^68]: [Publication 32: Glossary of Postal Terms](https://postalpro.usps.com/mnt/glusterfs/2016-04/pub32_glossary.pdf#page=96), PDF page 96: “Material mailed free of postage if mailed by or for the use of blind or other persons who cannot read or use conventionally printed materials because of a physical handicap. … Such mail is not considered part of any particular mail class but is treated as First-Class Mail pieces solely for determining standards for processing and delivery and for handling if undeliverable. … The mail must be marked “Free Matter for the Blind or Handicapped” in the upper right corner of the address side. … Free matter is also available as an international service. … Material mailed free of postage if mailed by or for the use of blind or other persons who cannot read or use conventionally printed materials because of a physical handicap. Such mail is not considered part of any particular mail class but is treated as First-Class Mail pieces solely for determining standards for processing and delivery and for handling if undeliverable. The mail must be marked “Free Matter for the Blind or Handicapped” in the upper right corner of the address side. Free matter is also available as an international service.” [^69]: [USPS Nonprofit Authorizations - Frequently Asked Questions](https://postalpro.usps.com/mnt/glusterfs/2024-08/NONPROFIT%20FAQ.v2.pdf#page=3), PDF page 3: “If an organization has been authorized and provided with a Nonprofit Authorization number (NPA), they can mail at Nonprofit USPS Marketing Mail prices at any post office that accepts bulk mailings within the United States. … No, you do not have to apply for nonprofit prices in the same state you received your Internal Revenue Code. … You may apply to mail at nonprofit prices while the Internal Revenue Services (IRS) assigns your Internal Revenue Code (IRC). … If you are a church or religious organization that has services with programs, you may submit Form 1023 “Application for Recognition of Exemption” under section 501(c)3 of the Internal Revenue Code. … Form 1023 is applicable for churches only; it must be signed, dated, and the customer must show proof of payment to the IRS. … We will use this form in lieu of the IRS letter code, 501(c)3. … If you are not a religious organization and do not have your IRC (yet), we will deny your application, citing “Premature” or ask you to withdraw, because our approval is based on the IRC assigned. … Product Solutions August 2024” [^70]: [DMM 703: Nonprofit USPS Marketing Mail and Other Unique Eligibility](https://pe.usps.com/text/dmm300/703.htm): “An exemption from the payment of federal income tax is not required to qualify for the Nonprofit USPS Marketing Mail prices. … Such exemption is considered as evidence of qualification for preferred postal prices, but is not the controlling factor in the decision.” [^71]: [Appendix D: Glossary of ACS™ Acronyms and Terminology](https://postalpro.usps.com/mnt/glusterfs/2018-02/AppendixD_GlossaryACSTermsAcronyms.pdf#page=6), PDF page 6: “The Price List is a 44-page publication that contains domestic and international prices and fees in a concise and accessible manner.” [^72]: [Publication 32: Glossary of Postal Terms](https://postalpro.usps.com/mnt/glusterfs/2016-04/pub32_glossary.pdf#page=59), page 55: “An official clarification of a mailing requirement issued by USPS when needed. The ruling presents examples of specific mailpieces and an analysis of how the mailing standard applies.” [^73]: [Publication 205 Electronic Verification System (eVS®) Business and Technical Guide](https://postalpro.usps.com/mnt/glusterfs/2024-07/eVS_pub205_July_2024_0.pdf#page=58), page 50: “Any parcels mailed as Package Service or USPS Marketing Mail cannot include content that requires First-Class Mail postage.” [^74]: [Publication 32: Glossary of Postal Terms](https://postalpro.usps.com/mnt/glusterfs/2016-04/pub32_glossary.pdf#page=144), PDF page 144: “A voluntary customer program administered by USPS that renders decisions on mailpiece design and price eligibility and issues a classification decision on the pieces in the mailer’s proposed mailing before it is presented at a business mail entry unit.” [^75]: [USPS Nonprofit Authorizations - Frequently Asked Questions](https://postalpro.usps.com/mnt/glusterfs/2024-08/NONPROFIT%20FAQ.v2.pdf#page=2), PDF page 2: “An organization may not mail at Nonprofit USPS Marketing Mail prices at a Post Office before an application is approved. … While an application is pending, postage must be paid at the applicable USPS Marketing Mail prices to qualify for a refund. … If an authorization to mail at Nonprofit USPS Marketing Mail prices is issued, the mailer may be refunded the postage paid at the Post Office where mailings were entered while the application was pending for any amount that exceeds the Nonprofit USPS Marketing Mail prices since the effective date of the authorization. … The effective date of the Nonprofit USPS Marketing Mail price authorization is the date of the application, or the date of the organization’s eligibility, whichever is later. … For mailings entered prior to submission of the application. … If postage was paid at any eligible price other than USPS Marketing Mail. … If the application (PS Form 3624) is denied and no appeal is filed.” [^76]: [Newspaper Mail Preparation & Entry](https://postalpro.usps.com/mnt/glusterfs/2024-12/Newspaper%20Mail%20Preparation%20and%20Entry%20V_2.pdf#page=4), PDF page 4: “Material that contains any one of the following printed items or that is referred to in a component of the Periodicals mailpiece (by the use of one of these items) is ineligible to be mailed at Periodicals prices: … The word “catalog.” … A First-Class Mail, USPS Marketing Mail, Parcel Select, or Package Services permit imprint.” [^77]: [Mail.dat Technical Specifications R65.0.0.0](https://postalpro.usps.com/mnt/glusterfs/2026-10/USPS_Mail_dat_Tech_Spec.pdf#page=436), PDF page 436: “All pieces on a statement must claim only one of the following Election Mail - Non-Ballot Materials, Election Mail - Official Ballots, or Political Mail. The statement will not be identified as any.” [^78]: [Election Mail Permit Based Solutions](https://postalpro.usps.com/mnt/glusterfs/2022-07/2022.07.22_Election%20Mail%20Permit%20Based%20Solutions_v1.pdf#page=3), PDF page 3: “Business mailings cannot be entered at commercial prices until the annual mailing fee is paid. … First-Class Mail and Marketing Mail require separate annual mailing fees.” [^79]: [BME Mailing Exception Request Process](https://postalpro.usps.com/mnt/glusterfs/2025-06/Exception%20Request%20Process.pdf#page=1), PDF page 1: “However, in the event a mailing does not meet USPS standards, an exception request may be submitted. … Not all exceptions will be granted. No exceptions will be granted for prices.” --- Unofficial. Not affiliated with or endorsed by the United States Postal Service. This is https://postalref.com/guides/mail-classes as Markdown.